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The effectiveness of intradermal platelet-rich plasma for the treatment of acquired bilateral nevus of Ota-like macules (Hori's nevus), in Institute of dermatology, Thailand, pilot study

The effectiveness of intradermal platelet-rich plasma for the treatment of acquired bilateral nevus of Ota-like macules (Hori's nevus), in Institute of dermatology, Thailand, pilot study

Status
Unknown
Phases
Phase 2
Study type
Interventional
Source
TCTR
Registry ID
TCTR20230113001
Enrollment
10
Registered
2023-01-13
Start date
2022-11-08
Completion date
Unknown
Last updated
2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Acquired bilateral nevus of Ota-like macule platelet rich plasma Nevus Nevus of Hori Acquired bilateral nevus of Ota-like macule

Interventions

PRP was injected into both lesional facial areas of each patient four times, at intervals of every two weeks (week 0, 2, 4, 6 of the study). Each session includes the following steps. 1. The blood wi
Active Comparator Drug
Intradermal platelet-rich plasma injection

Sponsors

Institute of Dermatology
Lead Sponsor

Eligibility

Sex/Gender
All
Age
25 Years to 65 Years

Inclusion criteria

Inclusion criteria: Patients between the ages of 25 and 65 with bilateral Hori's nevus

Exclusion criteria

Exclusion criteria: 1. Pregnancy and breastfeeding 2. History of PRP allergy 3. History of bleeding disorder such as thalassemia or thrombocytopenia 4. History of blood-borne disease include hepatitis B, hepatitis C or HIV 5. Patient who currently on anti-oxidant supplement such as vitamin C, vitamin E within 3 months prior. 6. Patient who got chemotherapy and anti-coagulant within three months prior to the study 7. Patient who had done LASER or IPL within three months prior to the study 8. Patient who concomitant use of whitening agents, chemical peeling within three months prior to the study 9. Patient who significantly had co-existing hyperpigmented lesion except Hori's nevus 10. Patient who has any active skin disease on the PRP injected area such as infection, skin cancer, dermatitis.

Design outcomes

Primary

MeasureTime frame
Hori nevus area and severity baseline (week 0 of the study) and the two-week, four-week, eight-week, and twelve-week post-treatment follow-ups (week 8, 10, 14 and 18 of the study) Modified derml pigmentation area and severity index

Secondary

MeasureTime frame
Melanin measurements baseline (week 0 of the study) and the two-week, four-week, eight-week, and twelve-week post-treatment follow-ups (week 8, 10, 14 and 18 of the study) Melanin index,Brightening of the lesion the two-week, four-week, eight-week, and twelve-week post-treatment follow-ups (week 8, 10, 14 and 18 of the study) Brightening score,Patients satisfaction the two-week, four-week, eight-week, and twelve-week post-treatment follow-ups (week 8, 10, 14 and 18 of the study) Patients satisfaction score,Side effect On each session, short-term side effect will be collected on day 1 and day 3 post-tx. long-term side effect will be collected at the 2-wk, 4-wk, 8-wk, and 12-wk post-tx followup Pain score, edema score, erythema(yes or no), hyperpigmentation (yes or no), infection ( yes or no), transient ischemia (yes or no), bruise (yes or no), papules (yes or no), pustules (yes or no)

Countries

Thailand

Contacts

Public ContactPasinee Deeudomwongsa

Institute of Dermatology

dr.pasineedee@gmail.com0974166653

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026